Here are two graph templates that I regularly use in my workflow, aimed at giving a clean starting point to build any material from! Set up a templates directory, throw these in there and they'll be ready for you any time you go to create a new graph :)
As an added bonus, when you export your textures from Designer with these templates, they will have the correct naming conventions following Unreal Engine naming standards (Ex: T_WoodPanel_BC, T_WoodPanel_N, etc.) The only thing you will need to adjust is the name of the graph as the name is derived from that!